small pistol primers
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Old 04-16-2013, 05:46 PM   #1
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Default small pistol primers

is it ok to reload 40s&w with magnum small pistol primers

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Old 04-16-2013, 07:34 PM   #2
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Chances are it would be OK but no one can answer that without knowing all your load data. Mag primers often slightly increase pressure so if you are already at maximum pressure it could cause trouble.

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Old 04-16-2013, 08:02 PM   #3
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I have done that before my suggestion though is starting at your lowest load data 2 start. And start with small batch

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Old 04-16-2013, 11:56 PM   #4
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I was told by a gun guru that magnum primers burn hotter than nonmagnum so be carefull and as stated earlier check your load data very carefully. The pressure could be devastating.

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Old 04-17-2013, 02:57 PM   #5
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I've never seen any advantage to it.

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Old 04-17-2013, 03:19 PM   #6
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I agree no advantage at all. except for convenience because of shortages. use what you have to get er done. obviously not a recommended procedure. but in a pinch it works. I have to admit the one time that I did it it was by accident. can you say rookie. lol. recently I did it again though on purpose because of shortages

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Old 04-18-2013, 12:06 PM   #7
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Im currently using mag primers because I couldnt get anything else. Im on the low end of my load data, and after 600 rounds there are no signs of overpressure. Just keep your load low and you should be fine. After your first batch look for signs of overpressure.

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Old 04-18-2013, 01:06 PM   #8
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i generally dont bother using non-magnum primers in any application anymore. its only dangerous if your at max load values. none of my loadings use max load data so i streamline my stockpiles by using only magnum primers. magnum primers also shouldnt be used for cartridges like 32acp 380 acp 25auto cases are just too small and in those the pressure spike is much greater and dangerous even with non max loads

nowadays though i use what i can find, so if non-magnum are available i buy em.

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Old 04-18-2013, 04:39 PM   #9
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I have been doing some testing with mag primers.



Unlike the 38/357 loads. The mag primers seem to make a bit more difference in a .40, as expected
180 Gr truncated cone lead 4.8 Gr Power Pistol 1.085
STD Primer 888/ 860 AVG 875
MAG Primer 917 / 888 AVG 903

The 4.8 PP load with mag primer is almost exactl the same as 5.0 Gr PP with a standard primer which averaged 905


http://thefiringline.com/forums/showthread.php?t=520835

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